On Thu, 6 Sep 2007, Nordlund, Dan (DSHS/RDA) wrote: >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Duncan Murdoch >> Sent: Thursday, September 06, 2007 4:54 PM >> To: [EMAIL PROTECTED] >> Cc: r-help@stat.math.ethz.ch; Philip James Smith >> Subject: Re: [R] computing distance in miles or km between 2 >> street addre >> >> On 06/09/2007 6:17 PM, (Ted Harding) wrote: >>> On 06-Sep-07 18:42:32, Philip James Smith wrote: >>>> Hi R-ers: >>>> >>>> I need to compute the distance between 2 street addresses in >>>> either km or miles. I do not care if the distance is a "shortest >>>> driving route" or if it is "as the crow flies." >>>> >>>> Does anybody know how to do this? Can it be done in R? I have >>>> thousands of addresses, so I think that Mapquest is out of the >>>> question! >>>> >>>> Please rely to: [EMAIL PROTECTED] >>>> >>>> Thank you! >>>> Phil Smith >>>
some other contributions deleted here >> > > There are a number of free address geocoding sites on the web, some of > which even support moderate amounts of batch geocoding for > non-commercial purposes. The following URL is just one of the available > sites turned up by Googling "address geocoding free". Of course, there > are also a number of commercial sites. > > http://www.batchgeocode.com/ > > Hope this is helpful, > > Dan > This and similar advice is helpful, but be aware that in thousands of addresses your most likely problem is to be malformed addresses. Addresses can be misspelt, not keyed in correctly or whatever. Companies that do geocoding often will do address cleanup. The way one of these companies works in New Zealand that I know of is that they run your address database through some matching software. Generally it still has unknown addresses. Then you can have the option of different levels of hand matching of the problem addresses. David Scott _________________________________________________________________ David Scott Department of Statistics, Tamaki Campus The University of Auckland, PB 92019 Auckland 1142, NEW ZEALAND Phone: +64 9 373 7599 ext 86830 Fax: +64 9 373 7000 Email: [EMAIL PROTECTED] Graduate Officer, Department of Statistics Director of Consulting, Department of Statistics ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
